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Record Heat Builds This Afternoon

By Meteorologist Joe Joyce, WBZ-TV
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BOSTON (CBS) -M They have run the Boston Marathon 115 times. Today will be the 116th. Today’s heat won’t to compare to the Hottest Marathons of all time.

Read: Boston Marathon Guide

In 1905 and 1976, the temperature scorched to 100.  Even in 1909, the temperature reached 97.  They called this marathon the Inferno!

Check: Current Conditions | Weather Map Center | Interactive Radar 

Today’s marathon will be more similar to 2004 where temps spiked to the mid 80’s.  Still hundreds had issues with heat exhaustion.

Temps are starting off in the 50’s and 60’s with some early clouds. A warm front is pushing north and we will see increasing sunshine and temperatures quickly responding to the sun, SW winds and 850 mb temps around 16 C by this afternoon. Dewpoints have started 55-60. Slightly drier air with breezy SW winds gusting to 25 mph will mix down in the afternoon.

As temps separate from the dew points a lower humidity will develop along with the breezy conditions.  The National Weather Service has issued a red flag warning until 8 p.m. for the potential for brush fires. Temps are expected to surge this afternoon with sunny skies with highs climbing into the 80’s nearing 90. The area with the best chance of reaching 90 would be Metrowest, Merrimack Valley and Worcester County. More of a southerly wind will help to keep beaches slightly cooler with lower 70’s on the Cape.

Record breaking heat is likely as most records are within reach from Boston to Worcester.

It will be a summer like evening tonight with lows holding in the lower 60’s.

A cold front will be pushing through dry air Tuesday morning with just a few patchy clouds. This front will start to bring in a cooler air, but it will have to wait until sunset. Highs on Tuesday will still be near 80 degrees – still about 25 degrees above normal!

High pressure will build in from the west for the midweek, providing a push of cooler air from Canada. Winds will be shifting onshore to keep it cooler at the beaches from Wednesday to Friday in the 50’s and lower 60’s.

Inland, more of a NW wind will prevail keeping temps in the 60’s inland with plenty of sunshine. After a brief midweek cool down, temps will climb back to near 70 with SW winds ahead of our next weather maker.

This will be a week of very low humidity, so the bone dry conditions will continue.  The Pollen count will be severe and the potential for brush fires resumes. What else is new? Just an awesome week of weather ahead.

Turning our attention to the weekend now and guess what?

There is a real chance of a good soaking rain fall for us! I am really looking forward to that.

Upper level ridging on the east coast will break down Saturday with a trough digging in on the east coast by Sunday. A low will be tracking though the Ohio Valley and through New England for the weekend. The first batch with a warm front will push through late Friday into Saturday with a few showers. But another more significant wave of low pressure could  follow up the coast on Sunday and last into Monday. This will likely be the rain maker to provide us with the kind of rain we really need!

There are some timing differences in the models we will have to fine tune in the coming days with the Euro being a slightly slower, drier & warmer solution, but still provides showers.

Right now Sunday into Monday appear to be our best chance of some beneficial rainfall.

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